So you're essentially saying the revelations were a false flag operation? I considered that possibility, but Snowden's background is well researched and the first thing media outlets look at before publishing their findings. The Guardian probably thoroughly doxed him before publishing anything. And in interviews he comes across as sincere and genuinely politically passionate. There's no way someone could fake all that. Snowden is the real deal.
If the NSA wanted to showcase their 'box of tricks' then they would have other ways of doing that like fake leaks that have a bunch of decoy material to confuse their enemies; not the real/actual tooling that is used to surveil (as that would be stupid). They would release plausible-looking material that advertises their capability, but be scant on the details and mechanics of the tooling itself.